A non-sterile implantable device designed to be inserted across the sacroiliac joint to provide temporary stabilization and to encourage long-term joint fusion, typically to alleviate pain from the joint. It is made of uncoated metal [e.g., titanium (Ti)], and typically in the form of a cylinder which may be threaded and/or fenestrated. It is typically surgically implanted under fluoroscopic guidance and may include dedicated disposable implantation instruments.